Simplify DB initialization

Summary:
Simplify DB initialization by removing some unit functions, since
Config values are now already initialized at module load time.

Reviewed By: akotulski

Differential Revision: D3522728

fbshipit-source-id: ac93d30

infer/src/IR/Tenv.re

@@ -143,12 +143,12 @@ let expand_type tenv typ =>
 let tenv_serializer: Serialization.serializer t = Serialization.create_serializer Serialization.tenv_key;
 
 let global_tenv: Lazy.t (option t) =
-  lazy (Serialization.from_file tenv_serializer (DB.global_tenv_fname ()));
+  lazy (Serialization.from_file tenv_serializer DB.global_tenv_fname);
 
 
 /** Load a type environment from a file */
 let load_from_file (filename: DB.filename) :option t =>
-  if (filename == DB.global_tenv_fname ()) {
+  if (filename == DB.global_tenv_fname) {
     Lazy.force global_tenv
   } else {
     Serialization.from_file tenv_serializer filename

infer/src/backend/DB.ml

@@ -121,25 +121,24 @@ let source_dir_get_internal_file source_dir extension =
   let fname = source_dir_name ^ extension in
   Filename.concat source_dir fname
 
-let captured_dir () =
+let captured_dir =
   Filename.concat Config.results_dir Config.captured_dir_name
 
-let sources_dir () =
+let sources_dir =
   Filename.concat Config.results_dir Config.sources_dir_name
 
 (** get the source directory corresponding to a source file *)
 let source_dir_from_source_file source_file =
-  Filename.concat (captured_dir ()) (source_file_encoding source_file)
+  Filename.concat captured_dir (source_file_encoding source_file)
 
 (** get the path to the copy of the source file to be stored in the results directory *)
 let source_file_in_resdir source_file =
-  Filename.concat (sources_dir ()) (source_file_encoding source_file)
+  Filename.concat sources_dir (source_file_encoding source_file)
 
 (** Find the source directories in the results dir *)
 let find_source_dirs () =
   let source_dirs = ref [] in
-  let capt_dir = captured_dir () in
-  let files_in_results_dir = Array.to_list (Sys.readdir capt_dir) in
+  let files_in_results_dir = Array.to_list (Sys.readdir captured_dir) in
   let add_cg_files_from_dir dir =
     let files = Array.to_list (Sys.readdir dir) in
     IList.iter (fun fname ->
@@ -147,7 +146,7 @@ let find_source_dirs () =
         if Filename.check_suffix path ".cg" then source_dirs := dir :: !source_dirs)
       files in
   IList.iter (fun fname ->
-      let dir = Filename.concat capt_dir fname in
+      let dir = Filename.concat captured_dir fname in
       if Sys.is_directory dir then add_cg_files_from_dir dir)
     files_in_results_dir;
   IList.rev !source_dirs
@@ -303,12 +302,12 @@ module Results_dir = struct
     filename_from_base base path
 
   (** directory of spec files *)
-  let specs_dir () = path_to_filename Abs_root [Config.specs_dir_name]
+  let specs_dir = path_to_filename Abs_root [Config.specs_dir_name]
 
   (** initialize the results directory *)
   let init () =
     create_dir Config.results_dir;
-    create_dir (specs_dir ());
+    create_dir specs_dir;
     create_dir (path_to_filename Abs_root [Config.attributes_dir_name]);
     create_dir (path_to_filename Abs_root [Config.sources_dir_name]);
     create_dir (path_to_filename Abs_root [Config.captured_dir_name]);
@@ -316,9 +315,8 @@ module Results_dir = struct
       create_dir (path_to_filename Abs_source_dir [])
 
   let clean_specs_dir () =
-    let specs_dir_path = specs_dir () in
-    create_dir specs_dir_path; (* create dir just in case it doesn't exist to avoid errors *)
-    let files_to_remove = Array.map (Filename.concat specs_dir_path) (Sys.readdir specs_dir_path) in
+    create_dir specs_dir; (* create dir just in case it doesn't exist to avoid errors *)
+    let files_to_remove = Array.map (Filename.concat specs_dir) (Sys.readdir specs_dir) in
     Array.iter Sys.remove files_to_remove
 
   (** create a file at the given path, creating any missing directories *)
@@ -345,9 +343,9 @@ type origin =
   | Spec_lib
   | Models
 
-let global_tenv_fname () =
+let global_tenv_fname =
   let basename = Config.global_tenv_filename in
-  filename_concat (captured_dir ()) basename
+  filename_concat captured_dir basename
 
 let is_source_file path =
   IList.exists

infer/src/backend/DB.mli

@@ -51,7 +51,7 @@ module Results_dir : sig
   val path_to_filename : path_kind -> path -> filename
 
   (** directory of spec files *)
-  val specs_dir : unit -> filename
+  val specs_dir : filename
 
   (** Initialize the results directory *)
   val init : unit -> unit
@@ -106,11 +106,6 @@ val source_file_to_string : source_file -> string
 (** convert a string obtained by source_file_to_string to a source file *)
 val source_file_from_string : string -> source_file
 
-exception No_project_root
-
-(** get the project root when it exists or raise No_project_root otherwise *)
-val project_root : unit -> string
-
 (** get the full path of a source file, raise No_project_root exception when used with a relative source file and no project root specified *)
 val source_file_to_abs_path : source_file -> string
 
@@ -125,7 +120,7 @@ type source_dir
 val source_dir_compare : source_dir -> source_dir -> int
 
 (** get the absolute path to the sources dir *)
-val sources_dir : unit -> string
+val sources_dir : string
 
 (** expose the source dir as a string *)
 val source_dir_to_string : source_dir -> string
@@ -140,7 +135,7 @@ val source_dir_from_source_file : source_file -> source_dir
 val source_file_in_resdir : source_file -> filename
 
 (** directory where the results of the capture phase are stored *)
-val captured_dir : unit -> filename
+val captured_dir : filename
 
 (** create the directory containing the file bane *)
 val filename_create_dir : filename -> unit
@@ -165,7 +160,7 @@ val read_file_with_lock : string -> string -> bytes option
 val update_file_with_lock : string -> string -> (bytes -> bytes) -> unit
 
 (** get the path of the global type environment (only used in Java) *)
-val global_tenv_fname : unit -> filename
+val global_tenv_fname : filename
 
 (** Check if a path is a Java, C, C++ or Objectve C source file according to the file extention *)
 val is_source_file: string -> bool

infer/src/backend/exe_env.ml

@@ -31,7 +31,7 @@ let tenv_filename file_base =
   if Sys.file_exists (DB.filename_to_string per_source_tenv_filename) then
     per_source_tenv_filename
   else
-    DB.global_tenv_fname ()
+    DB.global_tenv_fname
 
 (** create a new file_data *)
 let new_file_data source nLOC cg_fname =

infer/src/backend/inferprint.ml

@@ -36,7 +36,7 @@ let load_specfiles () =
     let all_filepaths = IList.map (fun fname -> Filename.concat dir fname) all_filenames in
     IList.filter is_specs_file all_filepaths in
   let specs_dirs =
-    let result_specs_dir = DB.filename_to_string (DB.Results_dir.specs_dir ()) in
+    let result_specs_dir = DB.filename_to_string DB.Results_dir.specs_dir in
     result_specs_dir :: Config.specs_library in
   IList.flatten (IList.map specs_files_in_dir specs_dirs)
 

infer/src/harness/inhabit.ml

@@ -195,8 +195,7 @@ let inhabit_call (procname, receiver) cfg env =
 let create_dummy_harness_file harness_name =
   let dummy_file_name =
     let dummy_file_dir =
-      let sources_dir = DB.sources_dir () in
-      if Sys.file_exists sources_dir then sources_dir
+      if Sys.file_exists DB.sources_dir then DB.sources_dir
       else Filename.get_temp_dir_name () in
     let file_str =
       Procname.java_get_class_name

infer/src/java/jMain.ml

@@ -92,35 +92,31 @@ let capture_libs linereader program tenv =
 
 (* load a stored global tenv if the file is found, and create a new one otherwise *)
 let load_tenv () =
-  let tenv_filename = DB.global_tenv_fname () in
-  let tenv =
-    if DB.file_exists tenv_filename then
+  if DB.file_exists DB.global_tenv_fname then
     begin
-        match Tenv.load_from_file tenv_filename with
+      match Tenv.load_from_file DB.global_tenv_fname with
       | None ->
           Tenv.create ()
       | Some _ when Config.analyze_models ->
           let error_msg =
             "Unexpected tenv file "
-              ^ (DB.filename_to_string tenv_filename)
+            ^ (DB.filename_to_string DB.global_tenv_fname)
             ^ " found while generating the models" in
           failwith error_msg
       | Some tenv ->
           tenv
     end
   else
-      Tenv.create () in
-  tenv
+    Tenv.create ()
 
 
 (* Store to a file the type environment containing all the types required to perform the analysis *)
 let save_tenv tenv =
   if not Config.analyze_models then JTransType.add_models_types tenv;
-  let tenv_filename = DB.global_tenv_fname () in
   (* TODO: this prevents per compilation step incremental analysis at this stage *)
-  if DB.file_exists tenv_filename then DB.file_remove tenv_filename;
-  JUtils.log "writing new tenv %s@." (DB.filename_to_string tenv_filename);
-  Tenv.store_to_file tenv_filename tenv
+  if DB.file_exists DB.global_tenv_fname then DB.file_remove DB.global_tenv_fname;
+  JUtils.log "writing new tenv %s@." (DB.filename_to_string DB.global_tenv_fname);
+  Tenv.store_to_file DB.global_tenv_fname tenv
 
 
 (* The program is loaded and translated *)

infer/src/llvm/lMain.ml

@@ -44,9 +44,8 @@ let store_icfg cg cfg =
     end
 
 let store_tenv tenv =
-  let tenv_filename = DB.global_tenv_fname () in
-  if DB.file_exists tenv_filename then DB.file_remove tenv_filename;
-  Tenv.store_to_file tenv_filename tenv
+  if DB.file_exists DB.global_tenv_fname then DB.file_remove DB.global_tenv_fname;
+  Tenv.store_to_file DB.global_tenv_fname tenv
 
 let () =
   begin match Config.source_file with